When people say Search engine optimization or “SEO” what they really mean is the idea of optimizing content for discovery (by people) and conversion (taking action and purchasing your products/services) across a broad spectrum of the web…not just search engines. SEO involves structuring a website so that it is found, read and indexed by search engines such as Google and Microsoft’s Bing. (Tip: Yahoo! gets its search results via Bing.)
A comprehensive approach to this idea of amplifying the overall reach and results of content creation, makes your website and its original content attractive, relevant and visible to search engines and web searchers, which produces a high search return for your brand, business or service. SEO is considered an organic form of search engine optimization.
SEO should be considered for every element of your website. However, the rules are in constant flux. Obeying key principles will allow your website to be indexed by the major search engines.